package com.stone;

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;



public class DownApp {

	
	 
	 public static void main(String[] args) throws Exception {  
	        //new一个URL对象  
	        URL url = new URL("http://apk.gfan.com/Aspx/UserApp/DownLoad.aspx?src=apkpage&apk=8Ud8XCfc1u4WYJ4OaQm5ghoko8QGWmWUPF45VEdKULuZp6j7B45AMj1cmGBLppfxVXteEfFsqCXW1y71EgcRe4LmwOcX8WZ/hfCNV48bEes=");  
	        //打开链接  
	        HttpURLConnection conn = (HttpURLConnection)url.openConnection();  
	        //设置请求方式为"GET"  
	        conn.setRequestMethod("GET");  
	        //超时响应时间为5秒  
	        conn.setConnectTimeout(5 * 1000);  
	        //通过输入流获取图片数据  
	        InputStream inStream = conn.getInputStream();  
	        //得到图片的二进制数据，以二进制封装得到数据，具有通用性   
	        byte[] data = readInputStream(inStream);  
	        //new一个文件对象用来保存图片，默认保存当前工程根目录  
	        System.out.println("得到文件数据");
	        File imageFile = new File("c:/BeautyGirl1.apk");  
	        //创建输出流  
	        FileOutputStream outStream = new FileOutputStream(imageFile);  
	        //写入数据  
	        outStream.write(data);  
	        //关闭输出流  
	        outStream.close();  
	        System.out.println("写入成功");
	    }  
	    public static byte[] readInputStream(InputStream inStream) throws Exception{  
	        ByteArrayOutputStream outStream = new ByteArrayOutputStream();  
	        //创建一个Buffer字符串  
	        byte[] buffer = new byte[1024];  
	        //每次读取的字符串长度，如果为-1，代表全部读取完毕  
	        int len = 0;  
	        //使用一个输入流从buffer里把数据读取出来  
	        while( (len=inStream.read(buffer)) != -1 ){  
	            //用输出流往buffer里写入数据，中间参数代表从哪个位置开始读，len代表读取的长度  
	            outStream.write(buffer, 0, len);  
	        }  
	        //关闭输入流  
	        inStream.close();  
	        //把outStream里的数据写入内存  
	        return outStream.toByteArray();  
	    }  
}
